Margin or edge gluing machine



R. L. RICHMOND 'HARGIN 0R EDGE GLUING MACHINE July 11, 1950 5Sheets-Sheet 1 Filed 001;. 1, 1946 INVENTOR. 205527 A. RICHMOND ATTOQ/VEY July, 11, 1950 R. L. RICHMOND IMRGIN 0R EDGE GLUING MACHINE.

3 Sheets-Sheet 2 Filed Oct. 1, 1946 INVENTOR.

eas er 4. RICHMOND ATTOQNEY R. L. RICHMOND MARGIN 0R EDGE GLI JINGMACHINE o 5 9 l L l y m J 3 Sheets-Sheet 3 Filed Oct. 1. 1946 INVENTORi05527 L. ,e/cx/MoA/p BY 6 g a I ATTOQN'Y UNITED STATES PATENT OFFICEMARGIN OR EDGE GLUING MACHINE Robert L. Richmond, Bronxvilie, N. Y.,assignor to Potdevin Machine Company, Brooklyn, N. Y., a corporation ofNew York Application October-.1, 1946, Serial No. 100,573

7 Claims. 1 My invention is directed to an improvement in margin or edgegluing machines.

This type of machine is used to glue or coatwith adhesive substances theedges of materials which by nature of their size or variations inthickness or irregular contour cannot be handled on the ordinary type orcoating machine, such as described for example in Adolph Potdevin PatentNo. 1,497,196.

There are numerous articles which require coating along or adjacent theedge, varying from carton ilaps of uniform thickness and considerablestiifness to edges of insert forms of thin paper. Both of the abovearticles are of uniform thickness and serve only to illustrate a rangeof materials. In between are luggage components and leather and papernovelties which vary in thickness from one end to the other as they arepassed through the machine. Some articles to be glued may consist of onethin piece of leather or fabric mounted on a stiller piece of material,such as cardboard, which in turn may already have a third piece, such asa pocket found in the inside of a suitcase.

One of the objects of my invention is to provide a machine which is soconstructed as to be able to apply an even adhesive coating along oradjacent the edge of materials such as those above mentioned and similarmaterials.

The machines now used in this art are not mechanically adapted to givethe desired results. The feed rollers that guide and feed the materialover the glue roller are mounted in bearings which are slidably mountedon the machine frame, but, due to the necessity of having an open sideto the machine so that wide Or irregularly shaped pieces may be held bythe operator, as is quite customary, the rollers and bearings are subjected to an eccentric loading. Due to this ec centric loading, abinding action takes place between the bearing housings of the, feedrollers and that portion of the frame upon which they are intended toslide.

, It will be apparent from the above explanation that this type ofmounting for the 'feed rollers does not provide a sufdciently uniformpressure between the work piece and the coating or gluing roller,particularly when the work consists of an article of varying thickness.It will be appreciated. also that if the feed roller bearing housings donot slide as intended on the frame of the machine, then the result is arelative misalignment of the gluing roller and feed rollers, which -2pressure adjacent the bearing side, and an insumcient pressure on thefree end of the rollers.

It is the purpose of my invention to provide means for mounting anddriving the feed rollers in such a fashion that they remain parallel tothe coating roller and maintain a. substantially uniform pressure on thecoating roller regardless of variation in thickness of the material tobe coated.

In the accompanying drawings,

Fig. 1 is an isometric view of a gluing machine embodying my invention;

Fig. 2 is a somewhat schematic view of the drive therefor;

Fig. 3 is a view similar to Fig. 1 of a slightly different type ofgluing machine embodying my invention;

Fig. 4 shows schematically the drive therefor; and

Fig. 5 is a fragmentary elevational view of a further embodiment of theinvention.

Referring to the drawings in detail, and first of all to Figs. 1 and 2:

2 designates the gluing or coating roller and l and 6 the i'eed rollers.The glue pan is designated 8 and contains the adhesive which is pickedup by the coating roller 2 and applied to the edge of a sheet ofmaterial which is fed between the rollers t and 6 and the coatingroller. As is customary, the machine is opensided, that is, the roller2, 4 and 6 are mounted in bearings at their inner ends, so that stripsor sheets of any width may be passed through the machine and adhesiveapplied to the edge thereof.

' As above explained, these machines are intend- Q ed to accommodatesheets or strips of diiierent in time results in an uneven coating, toogreat a thicknesses, and. also sheets which may not be and often are notof uniform thickness. It is an object of my invention so to mount thefeedrollers 4 and 6 that the pressure on the sheets being treated willbe. substantially constant. This necessitates relative movement, bodilymovement, between the feed rollers and the coating roller. I havealready explained the inherent defects of this general type of machineas conventionally constructed.

According to the present invention, the supporting shaft In for the feedroller 4 is mounted in suitable bearings in an arm H, which is pivotedat M to a suitablebracket l6, carried by the machine frame.

The supporting shaft It for the feed roller 8 is mounted in suitablebearings in an arm 20, pivoted at 22 to asuitable bracket 24, carried bythe machine frame. The pressure or the feed rollers is regulated by apressure spring 26, which is adjustable.

From the description thus far given it will be apparent that, as stripsof different thicknesses are fed through the machine between the feedrollers 4 and 6 and the coating roller 8, the feed rollers will movebodily toward or away from the coating'roller automatically, pivotingabout the pivots l4 and 22, so that the pressure on the strip or sheetbeing operated upon is substantially constant. It will be appreciatedalso that the pressure on the strip or sheet will be substantiallyconstant even though the strip or sheet is not of uniform thickness.

It will be appreciated furthermore, that there can be no binding of therollers, as in the conventional machines above referred to, bodilymovement of the feed rollers away from or toward the coating rollermerely requiring-pivoting of the feed roller supporting arms 2 and abouttheir respective pivots. It is to be noted also that the feed rollerspivot independently of each other, a further safeguard against anybinding or other undesirable action.

The feed rollers as well as the coating roller are positively driven,and hence it becomes necessary to provide driving mechanism which is ofsuch a nature as to permit of the bodily movement of the ,feed rollersabove described, without disrupting the driving mechanism and withoutrequiring any adjustment of the same other than an automatic one.

. One form of driving mechanism suitable for my improved machine isshown schematically in Fig. 2, to which reference will now be made.

28 designates the main drive pulley, which, through chain or belt 38,drives pulley 32. This pulley 32 is mounted on the same shaft asreduction gear 34, which is in constant mesh with gear-36. The gear 36is on the shaft 38, which carries the coating roller 2. The shaft 38also .carries a gear 40 whichmeshes with a gear 42 in turn in mesh withgear 44, the latter being in constant mesh with gears 46 and 48 carriedrespectively by the shafts I8 and I8 of the feed rollers 4 and 6.

It will be apparent that this gear train will effect the desired driveof the coating roller 2 and the feed rollers 4 and 6,.and also permit.of bodily pivoting of the feed rollers about their ,respective pivotstoward and away from the coating roller without disrupting the drivingmechanism.

.From the foregoing it will be appreciated that Ihave provided a coatingmachine, more par- .ticularly an edge gluer or coater which will ac-.commodate strips or sheets of different thicknesses and which strips orsheets may be nonuniform in thickness, the pressure of the feed rollersupon the sheets or strips being substantially constant. It will beapparent too that all danger of binding of the feed rollers iseliminated.

' Certain thin materials require a smaller diameter feed roller than themachine just described, placed lower down onthe periphery of the coat-'.ing roller. I In Figs. 3 and 4 I have illustrated an embodi- 'ment ofsuch a machine.

In this embodiment of the invention, 2 designates the coating roller,-6one of the feed rollers, and 56 the other feed roller, which as shown isrelatively small in diameter. The feed roller 6, as before, is mountedon shaft l8, in turn mounted in bearings in arm 20, pivoted at 22 tobracket 24, carried by the machine frame. The pressure of this feedroller is regulated by pressure spring 58.

Feed roller 56 which is considerably lower down on the periphery of thecoating roller 2, than feed roller 4 of Fig. 1, is mounted on shaft 68,carried in bearings in arm 62, pivoted at 84 to a bracket 66, carried bythe machine frame. The pressure of this roller is regulatedindependently of feed roller 6 by adjusting wheel 68. This machine hasthe same advantages as that of Fig. 1 in that, the feed rollers beingcarried by the pivoted arms 28 and 62, their pressure upon the material,despite variations in the material thickness, will be substantially.constant.

The drive for this machine has been shown as comprising pulley 28driving pulley 32 through chain or belt 30. The pulley 32 is on the sameshaft as a gear 34 which constantly meshes with a gear 36 on the shaft38 of the coating roller 2. The shaft 38 also carries a gear 40 in meshwith gear 42. This gear meshes with gear 44 in constant mesh with gear48 on the shaft it of the feed roller 6. This permits this feed rollerto move bodily toward or away from the coating roller 2 withoutinterrupting its operation.

The feed roller 56 is carried on the shaft 60, as above pointed out.This shaft carries gear 18 in mesh constantly with the gear 36 carriedby the shaft of the coating roller 2." The feed roller 56, therefore,can be moved bodily toward and away'from the coating roller withoutinterrupting its operation.

In the embodiment of the invention illustrated in Fig. 5 I mount thefeed rollers 4 and 6 on arms 10 and 12, respectively, and pivot thesearms for independent pivotal movement on a single pivot pin 14, so thateach roller is free to move independently of the other. The driveillustrated comprises gears 34 and 36, 40, 42, 44, 48, the latter beingonshaft l8 of feed roller 6, gear 18 and gear 46 on shaft III of feedroller 4.

This embodiment of my invention gives a cleaner construction to themachine and better accessibility to the feed end. This machine hasanother advantage in that the pivot pin I4 is removable, and when it isdesired to use the machine for a wide range of uses it is a simplematter to convert the machine from a double feed roll machine to asingle feed roll merely by removing this pin and substituting a'singleroller arm for the arms 18 and I2.

It will be apparentfrom all of the foregoing that I have provided amachine for applying adhesive to the edges or margins 'of sheets andstrips, particularly those of varying thickness wherein the feed rollerpressure is substantially constant despite variations in thickness ofthe material being handled. It will be apparent also that by reason ofmy improved construction danger of binding'ofthe feed rollers or theirbearings has been eliminated. V

It is to be understood that I am not to be limited to the gearing shown,inasmuch as I may employ chains or belts to drive the feed rollers, andthat other changes may be made in the details of construction andarrangement of parts within the purview of my invention.

What I claim is:

tion of a coating roller, a pair of feed rollers at the periphery ofthecoating roller, the axes. of said feed rollers being parallel to theaxisof the coating roller, an arm at the inner end of each 1. In a margingluing machine, the combinaof said feed rollers providing a bearing forthe feed rollers, the outer end of the feed rollers being free, saidarms extending transversely of the axes of the feed rollers and apivotal mount for each arm oflset with respect to the axes of the saidthree rollers-and extending transversely of the arm, for permittingbodily'displacement of the feed rollers toward and away from the coatingroller while preventing bodily movement of the feed rollers in anydirection other than parallel to the axis of the coating roller.

2. In a margin gluing machine, the combination of a coating roller, apair of feed rollers at the periphery of the coating roller, the axes ofsaid rollers being parallel to the axis of the coating roller, an arm atthe inner end of each of said feed rollers providing a bearing for thefeed rollers, the outer end of the feed rollers being free, said armsextending transversely of the axes of the feed rollers and a pivotalmount for each arm oflset with respect to the axes of the said threerollers and extending transversely of the arm, for permitting bodilydisplacement of the feed rollers toward and away-from the coating rollerwhile preventing bodily movement of the feed rollers in any directionother than parallel to the axis of the coating roller, and drivingmechanism for said feed rollers operative throughout the said bodilydisplacement of the feed rollers.

3. In a margin gluing machine, the combination of a coating roller, apair of feed rollers at tion of a. coating roller, a pair of feedrollers at the periphery of the coating roller, the axes of said vfeedrollers being parallel to the axis of the coating roller, an arm at theinner end of each of said feed rollers, said arms extending transverseto the axes of the said rollers and in alignment with each other, theinner end of each arm providing a bearing for the inner end of a feedroller, the outer end of the feed rollers being free, and a pivotalmount for each arm at the outer end thereof, said mount comprising abearing extending parallel to the axes of the feed rollers, whereby thefeed rollers will be displaced bodily with respect to the coating rollerwhile maintaining the parallelism of the rollers when a strip ofnonuniform thickness passes between the coating roller and the feedrollers, and driving mechanism for all of said rollers.

6. In a margin gluing machine, the combination of a coating roller, 9,pair of feed rollers at the periphery of the coating roller, the axes ofsaid feed rollers being parallel to the axis of the coating roller, anarm at the inner end of each of said feed rollers, said arms extendingtransverse to the axis of the said rollers and in alignment with eachother, the inner end of each arm providing a bearing for the inner end01' a feed roller, the outer end of the feed rollers the periphery ofthe coating roller, the axes of free, said arms extending transverselyof the axes 0f the feed rollers, and a'pivotal mount for being free, anda pivotal mount for each arm at the outer end thereof, said mountcomprising a bearing extending parallel to the axes of the feed rollers,whereby the feed rollers will be displaced bodily with respect to thecoating roller while maintaining the parallelism of the rollers when astrip of non-uniform thickness passes between the coating roller and thefeed rollers, and driv- -ing mechanism of all 01' said rollers operativeeach arm offset with respect to the axes of the feed rollers andcomprising a bearing pin which extends parallel to the axes of the feedrollers, whereby the feed rollers may be bodily displaced with respectto the coating roller while maintaining the parallelism of the'rollersbut are restrained against bodily displacement out of parallelismwiththe coating roller.

4. In a margin gluing machine, the combination of a coating roller, 9,pair of feed rollers at the periphery of the coating roller, the axes ofsaid feed rollers being parallel to the axis of the coating roller,-anarm at the inner end of each of said feed rollers, each'of said armsproviding a supporting bearing for the inner end of a feed roller, theouter end of each teed roller being free, said arms extendingtransversely of the axes of the feed rollers, and a pivotal mount foreach arm offset with respect to the axes oi the feed rollers andcomprising a bearing pin which exthroughout the said bodily displacementof the feed rollers.

'7. In a margin gluing machine, the combination of a coating roller, apair of cooperating feed rollersdisposed parallel thereto, a pair ofpivoted arms each carrying one of said feed rollers, a removable pivotpin common to said arms and extending parallel to the axes of the feedrollers, said pivot pin being offset with respect to the axes of thethree rollers, said arms pivoting about said pivot pin in response tovarying thicknesses of material passing between the coating roller andthe feed rollers, bodily to displace the feed rollers, said pivot pinmaintaining the parallelism of the rollers, and driving mechanism forthe feed rollers operative throughout the bodily displacement of thefeed rollers.

ROBERT L. RICHMOND.

REFERENCES CITED The following references are of record in the file orthis patent:

UNITED STATES PATENTS Camp! Mar. 6, 1945

